body{
	margin: 0px;
}
#background{
	width: 100%;
	height: 100%;
}
#mainbody{
	width: 100%;
	height:600px;
	position: relative;
}
.bottom{
	width: 100%;
	height: 20%;
	position: absolute;
	bottom: 0px;
}
.span1{
	padding: 20px;
	background-image: url(../img/图片5.png);
}
.tu1{
	width: 20%;
	height: 100%;
	position: relative;
}
.tu2{
	width: 20%;
	height: 100%;
	position: relative;
	left: 37%;
	top: -120px;
}
.tu3{
	width: 20%;
	height: 100%;
	position: relative;
	left: 72%;
	top: -245px;
}
.yishu{
	width: 40%;
	height: 60px;
	position: absolute;
	left: 700px ;
	top: 50px;
}
.yingpian_biaoti{
	width: 10%;
	height: 20px;
	position: absolute;
	top: 200px;
	right: 180px;
	color: white;
	font-family: 楷体;
}
.yingpian{
	width: 25%;
	height: 150px;
	position: absolute;
	top: 220px;
	right: 40px;
}
